Pistachio is a nut crop domesticated in the Fertile Crescent and a dioecious species with ZW sex *** sequenced the genomes of Pistacia vera cultivar(cv.)Siirt,the female parent,and *** ***,the male *** chromosome-leve...
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Pistachio is a nut crop domesticated in the Fertile Crescent and a dioecious species with ZW sex *** sequenced the genomes of Pistacia vera cultivar(cv.)Siirt,the female parent,and *** ***,the male *** chromosome-level reference genomes of pistachio were generated,and Z and W chromosomes were *** ZW chromosomes originated from an autosome following the first inversion,which occurred approximately 8.18 *** inversion events in the W chromosome led to the formation of a 12.7-Mb(22.8%of the W chromosome)non-recombining *** W-specific sequences contain several genes of interest that may have played a pivotal role in sex determination and contributed to the initiation and evolution of a ZW sex chromosome system in *** W-specific genes,including defA,defA-like,DYt1,two PtEN1,and two tandem duplications of six VPS13A paralogs,are strong candidates for sex determination or *** history analysis of resequenced genomes suggest that cultivated pistachio underwent severe domestication bottlenecks approximately 7640 years ago,dating the domestication event close to the archeological record of pistachio domestication in *** identified 390,211,and 290 potential selective sweeps in 3 cultivar subgroups that underlie agronomic traits such as nut development and quality,grafting success,flowering time shift,and drought *** findings have improved our understanding of the genomic basis of sex determination/differentiation and horticulturally important traits and will accelerate the improvement of pistachio cultivars and rootstocks.
Background and Study Aims: Routine coagulation screening prior to gastrointestinal endoscopy is performed in many centres in the UK, despite the lack of any evidence to supportthe practice. the aim of this study was ...
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Background and Study Aims: Routine coagulation screening prior to gastrointestinal endoscopy is performed in many centres in the UK, despite the lack of any evidence to support the practice. the aim of this study was to assess the benefits of routine pre-endoscopy coagulation screening in children and to assess how widespread this practice is in the UK. Patients and Methods: We performed a retrospective analysis of the case notes of 250 consecutive patients who had undergone routine coagulation screening prior to endoscopy and biopsy, in accordance with our unit’s protocol, looking for evidence of abnormal results or episodes of bleeding. We also performed a telephone survey of the protocols for coagulation screening at other paediatric units in the UK which are known to perform gastro-intestinal endoscopy on a routine basis. Results: According to our hospital’s laboratory reference ranges, 16.8%of the children who underwent endoscopy and biopsy had abnormal clotting. this was neither clinically significant nor associated with an increased bleeding risk in any patient. Of the 23 UK paediatric gastroenterology centres surveyed, including our own, five (21.7%) perform routine coagulation screening before endoscopy. Conclusions: this study suggests that, although it is a relatively common practice, routine coagulation screening is not indicated in children who are undergoing gastrointestinal endoscopy and biopsy, and that it does not predict those at risk of significant bleeding. We would therefore suggest that if pre-endoscopy screening is to be performed, it should be reserved for those who are potentially at high risk of bleeding.
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